Intel Core i9-7940X vs Intel Xeon E-2388G Comparison

Head-to-Head Benchmarks

The recorded benchmark data presents an unusual split: the Intel Core i9-7940X dominates seven of the eight head-to-head comparisons, while the Intel Xeon E-2388G secures a single, decisive victory in one specific test. The overall pattern shows the i9-7940X leading across Cinebench workloads with remarkably consistent margins, while the Xeon E-2388G counters with a substantial Geekbench single-core advantage.

Starting with multi-core performance, the i9-7940X wins every Cinebench iteration. In Cinebench R15 multi-core, it scores 2161 against the Xeon's 2009, a 7.6% advantage. The R20 multi-core test shows 9006 versus 8374, a 7.5% lead. In R23 multi-core, the i9-7940X records 21444 compared to 19939, again 7.5% ahead. These results indicate a consistent, roughly 7.5% multi-core superiority across all three Cinebench versions, likely attributable to the i9-7940X's 14 cores and 28 threads versus the Xeon's 8 cores and 16 threads.

Single-core Cinebench results also favor the i9-7940X, though the margins are similar to the multi-core deltas. In R15 single-core, the i9-7940X scores 305 versus 283, a 7.8% win. R20 single-core shows 1271 against 1181, a 7.6% lead. R23 single-core records 3027 versus 2814, a 7.6% advantage. This uniformity across single-core and multi-core Cinebench tests is striking: the i9-7940X holds a nearly identical edge in every Cinebench workload, regardless of thread count.

Geekbench results tell a different story. In Geekbench multi-core, the i9-7940X scores 10516 versus 9615, a 9.4% margin, which is its largest win in any test. However, in Geekbench single-core, the Xeon E-2388G scores 2227 versus the i9-7940X's 1445, a massive 35.1% advantage. This single result flips the narrative: while the i9-7940X leads in overall compute throughput, the Xeon shows dramatically stronger per-thread performance in the Geekbench single-core metric.

The aggregate benchmark score reflects this split. The i9-7940X has an average benchmark score of 6147, while the Xeon E-2388G averages 5805. The i9-7940X sits at the 61st percentile among all CPUs, and the Xeon also sits at the 61st percentile, indicating they occupy similar overall performance tiers despite their architectural differences. The i9-7940X's nearest rivals include the AMD EPYC 7501 (average 6128, a 0.3% difference) and AMD EPYC 7272 (average 6186, a -0.6% difference), placing it in a tightly contested server-class performance band. The Xeon E-2388G's nearest rivals include the AMD EPYC 7401P (average 5814, a -0.2% difference) and Intel Xeon W-2175 (average 5770, a 0.6% difference), showing it also sits amid strong competition.

The Verdict

From the data alone, the Intel Core i9-7940X is the clear choice for users prioritizing sustained multi-core throughput and consistent Cinebench performance. It wins seven of eight head-to-head benchmarks, with margins ranging from 7.5% to 9.4% in all tests except Geekbench single-core. Its 14 cores and 28 threads, combined with a quad-channel memory bus delivering 85.3 GB/s of bandwidth, provide a solid foundation for parallel workloads. The i9-7940X's launch MSRP was $1399, and it is now end-of-life, but its benchmark profile shows it remains competitive against newer server parts.

The Intel Xeon E-2388G, however, is the right choice for workloads that depend overwhelmingly on single-threaded responsiveness, particularly as measured by Geekbench. Its 35.1% single-core advantage over the i9-7940X is substantial and cannot be ignored. The Xeon also brings ECC memory support, integrated UHD Graphics P750, and a lower 95W TDP compared to the i9-7940X's 165W, making it a more power-efficient option for server environments. Its launch MSRP was $539, and it remains in active production.

For users who need both high multi-core throughput and strong single-core performance, the data suggests a trade-off: the i9-7940X offers better Cinebench results across the board, while the Xeon E-2388G offers a dramatically higher Geekbench single-core score. The average benchmark scores put the i9-7940X at 6147 versus 5805 for the Xeon, a 5.9% aggregate advantage. But the single-core Geekbench gap is so large that it may outweigh the multi-core wins in specific application scenarios.

Where Each One Wins

The Intel Core i9-7940X wins in every Cinebench test, both single-core and multi-core, across R15, R20, and R23 versions. This indicates it has a consistent architectural advantage in rendering and simulation workloads that use the Cinebench engine. Its multi-core Geekbench score also wins by 9.4%, the largest margin in its favor. Users running CPU-bound rendering tasks, video encoding, or scientific simulations that scale across many threads will find the i9-7940X's 14 cores and 28 threads beneficial. The quad-channel memory bus, with 85.3 GB/s bandwidth, provides ample data throughput for memory-intensive parallel workloads.

The Intel Xeon E-2388G wins only in Geekbench single-core, but by an enormous 35.1% margin. This suggests that for lightly threaded applications, database queries, or workloads where each thread must complete quickly and independently, the Xeon's higher boost clock of 5.10 GHz and newer Rocket Lake architecture deliver a decisive edge. The Xeon also supports ECC memory, which is critical for data integrity in server environments where memory errors cannot be tolerated. Its integrated UHD Graphics P750 provides basic display output without requiring a separate GPU, a feature the i9-7940X lacks entirely. The Xeon's dual-channel memory bus, while narrower, still delivers 51.2 GB/s of bandwidth, sufficient for many server workloads.

The production status difference is also notable: the i9-7940X is end-of-life, while the Xeon E-2388G is active. For long-term deployments requiring ongoing availability, the Xeon's active status is a practical advantage. The i9-7940X's end-of-life status may limit future supply and support options.

FAQ

Q: Which processor has higher multi-core performance?

A: The Intel Core i9-7940X consistently wins all multi-core Cinebench tests, with scores of 2161 in R15, 9006 in R20, and 21444 in R23, compared to the Xeon E-2388G's 2009, 8374, and 19939, respectively. It also wins Geekbench multi-core with 10516 versus 9615.

Q: How much faster is the Xeon E-2388G in single-core Geekbench?

A: The Xeon E-2388G scores 2227 in Geekbench single-core, while the i9-7940X scores 1445, giving the Xeon a 35.1% advantage in that specific test. Notably, the i9-7940X wins all single-core Cinebench tests, so this Geekbench result is the exception.

Q: What are the core and thread counts for each processor?

A: The Intel Core i9-7940X has 14 cores and 28 threads. The Intel Xeon E-2388G has 8 cores and 16 threads.

Q: Do both processors support ECC memory?

A: No. The Intel Xeon E-2388G supports ECC memory, while the Intel Core i9-7940X does not. This is a key differentiator for server and workstation reliability requirements.

Q: What is the boost clock difference between the two?

A: The Intel Xeon E-2388G has a boost clock of 5.10 GHz, while the Intel Core i9-7940X has a boost clock of 4.40 GHz. The Xeon's higher boost clock likely contributes to its Geekbench single-core dominance.

Q: Which processor has a higher average benchmark score?

A: The Intel Core i9-7940X has an average benchmark score of 6147, compared to 5805 for the Intel Xeon E-2388G. Both sit at the 61st percentile among all CPUs.

Architecture Differences

The two processors represent different architectural generations and design philosophies. The Intel Core i9-7940X is based on the Skylake-X architecture, using a 14 nm process node with a die size of 484 mm². It features 14 cores, 28 threads, and a cache hierarchy of 64 KB L1 per core, 1 MB L2 per core, and 19.25 MB shared L3. The Xeon E-2388G is based on the Rocket Lake-E architecture, also using a 14 nm process but with a smaller die size of 276 mm². It has 8 cores, 16 threads, and a cache layout of 80 KB L1 per core, 512 KB L2 per core, and 16 MB shared L3.

Memory architecture differs significantly. The i9-7940X supports DDR4 memory with a quad-channel bus, delivering 85.3 GB/s of bandwidth. The Xeon E-2388G also supports DDR4 but with a dual-channel bus, providing 51.2 GB/s. The i9-7940X's wider memory bus is a clear advantage for bandwidth-hungry workloads, while the Xeon's narrower bus is offset by its higher per-thread performance.

PCIe capabilities also differ. The i9-7940X offers PCIe Gen 3 with 44 lanes from the CPU, while the Xeon E-2388G provides PCIe Gen 4 with 20 lanes. The newer PCIe Gen 4 standard doubles the per-lane bandwidth, but the i9-7940X's higher lane count allows for more expansion cards. The Xeon includes integrated UHD Graphics P750, while the i9-7940X has no integrated graphics.

Socket compatibility is entirely separate: the i9-7940X uses Intel Socket 2066, while the Xeon E-2388G uses Intel Socket 1200. This means they are not interchangeable in any motherboard. The i9-7940X has an unlocked multiplier, while the Xeon E-2388G is locked, limiting overclocking on the Xeon. The i9-7940X was released in 2017 and is end-of-life, while the Xeon E-2388G was released in 2021 and remains active. The i9-7940X's launch MSRP was $1399, the Xeon's was $539. The i9-7940X has a TDP of 165W, the Xeon's TDP is 95W, making the Xeon more power-efficient per thread.